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BMC Genetics

Bolun Yu, Dongxin Huai, Li Huang, Yanping Kang, Xiaoping Ren, Yuning Chen, Xiaojing Zhou, Huaiyong Luo, Nian Liu, Weigang Chen, Yong Lei, Manish K Pandey, Hari Sudini, Rajeev K Varshney, Boshou Liao, Huifang Jiang
BACKGROUND: Aflatoxin contamination caused by Aspergillus flavus is a major constraint to peanut industry worldwide due to its toxicological effects to human and animals. Developing peanut varieties with resistance to seed infection and/or aflatoxin accumulation is the most effective and economic strategy for reducing aflatoxin risk in food chain. Breeding for resistance to aflatoxin in peanut is a challenging task for breeders because the genetic basis is still poorly understood. To identify the quantitative trait loci (QTLs) for resistance to aflatoxin contamination in peanut, a recombinant inbred line (RIL) population was developed from crossing Zhonghua 10 (susceptible) with ICG 12625 (resistant)...
March 12, 2019: BMC Genetics
Yanyou Jiang, Yongzhi Yang, Zhiqiang Lu, Dongshi Wan, Guangpeng Ren
BACKGROUND: The genus Ostrya (Betulaceae) contains eight species and four of them are distributed in China. However, studies based on limited informative sites of several chloroplast markers failed to resolve interspecific delimitation and relationships among the four Chinese species. In this study, we aimed to use the whole chloroplast genomes to address these two issues. RESULTS: We assembled and annotated 33 complete chloroplast genomes (plastomes) of the four Chinese species, representing 17 populations across most of their geographical distributions...
March 12, 2019: BMC Genetics
Liangliang Ju, Guangbing Deng, Junjun Liang, Haili Zhang, Qiao Li, Zhifen Pan, Maoqun Yu, Hai Long
BACKGROUND: High isoelectric point α-amylase genes (Amy1) play major roles during cereal seed germination, and are associated with unacceptable high residual α-amylase activities in ripe wheat grains. However, in wheat and barley, due to extremely high homology of duplicated copies, and large and complex genome background, the knowledge on this multigene family is limited. RESULTS: In the present work, we identified a total of 41 Amy1 genes among 13 investigated grasses...
March 7, 2019: BMC Genetics
Evžen Korec, Matyáš Hančl, Marie Bydžovská, Ondřej Chalupa, Jana Korcová
BACKGROUND: The inheritance of different coat colours in the Cane Corso Italiano dog has not been described thus far. We analysed data from 23,271 dogs and bitches using the Cane Corso Italiano Pedigree Database. We are describing for the first time the coat colour segregation ratios in Cane Corso Italiano offspring arising from crosses between parents of all possible coat colour combinations. RESULTS: Segregation ratios that do not follow a Mendelian pattern suggest that additional genes are active in the determination of coat colour...
March 4, 2019: BMC Genetics
Chunhua Zhao, Na Zhang, Yongzhen Wu, Han Sun, Cheng Liu, Xiaoli Fan, Xuemei Yan, Hongxing Xu, Jun Ji, Fa Cui
BACKGROUND: Common wheat (Triticum aestivum L.) is one of the most important food crops worldwide. Wheat spike-layer uniformity related traits (SLURTs) were complex traits that directly affect yield potential and appearance. In this study, quantitative trait locus (QTL) for five SLURTs among inter-tillers were first documented using a recombinant inbred line (RIL) mapping population derived from a cross between Kenong9204 and Jing411 (represented by KJ-RILs). Genetic relationships between SLURTs and yield were characterized in detail...
February 28, 2019: BMC Genetics
David Forgacs, Rick L Wallen, Amy L Boedeker, James N Derr
BACKGROUND: The collection and analysis of fecal DNA is a common practice, especially when dealing with wildlife species that are difficult to track or capture. While fecal DNA is known to be lower quality than traditional sources of DNA, such as blood or other tissues, few investigations have verified fecal samples as a valid source of DNA by directly comparing the results to high quality DNA samples from the same individuals. Our goal was to compare DNA from fecal and blood samples from the same 50 American plains bison (Bison bison) from Yellowstone National Park, analyze 35 short tandem repeat (STR) loci for genotyping efficiency, and compare heterozygosity estimates...
February 26, 2019: BMC Genetics
Ling-Yun Chang, Sajjad Toghiani, Samuel E Aggrey, Romdhane Rekaya
BACKGROUND: It becomes clear that the increase in the density of marker panels and even the use of sequence data didn't result in any meaningful increase in the accuracy of genomic selection (GS) using either regression (RM) or variance component (VC) approaches. This is in part due to the limitations of current methods. Association model are well over-parameterized and suffer from severe co-linearity and lack of statistical power. Even when the variant effects are not directly estimated using VC based approaches, the genomic relationships didn't improve after the marker density exceeded a certain threshold...
February 22, 2019: BMC Genetics
Kenny Helsen, Jenny Hagenblad, Kamal P Acharya, Jörg Brunet, Sara A O Cousins, Guillaume Decocq, Pieter De Frenne, Adam Kimberley, Annette Kolb, Jana Michaelis, Jan Plue, Kris Verheyen, James D M Speed, Bente J Graae
BACKGROUND: The observation that many alien species become invasive despite low genetic diversity has long been considered the 'genetic paradox' in invasion biology. This paradox is often resolved through the temporal buildup genetic diversity through multiple introduction events. These temporal dynamics in genetic diversity are especially important for annual invasive plants that lack a persistent seed bank, for which population persistence is strongly dependent on consecutive seed 're-establishment' in each growing season...
February 19, 2019: BMC Genetics
L Huang, S Tepaamorndech, C P Kirschke, Y Cai, J Zhao, Xiaohan Cao, Andrew Rao
BACKGROUND: A genome-wide mapping study using male F2 zinc transporter 7-knockout mice (znt7-KO) and their wild type littermates in a mixed 129P1/ReJ (129P1) and C57BL/6J (B6) background identified a quantitative trait locus (QTL) on chromosome 7, which had a synergistic effect on body weight gain and fat deposit with the znt7-null mutation. RESULTS: The genetic segment for body weight on mouse chromosome 7 was investigated by newly created subcongenic znt7-KO mouse strains carrying different lengths of genomic segments of chromosome 7 from the 129P1 donor strain in the B6 background...
February 18, 2019: BMC Genetics
Qinrui Yang, Baonian Liu, Chengchen Shao, Yuxiang Zhou, Yining Yao, Yuyin Pan, Kuan Sun, Hongmei Xu, Chengtao Li, Ting Wei, Yueqin Zhou, Qiqun Tang, Jianhui Xie
BACKGROUND: An STR locus with tri-allelic pattern is occasionally observed in routine forensic casework. The extra copy of TPOX locus with tri-allelic pattern in populations has been assumed to be inserted into an X chromosome, which took place forth before the Bantu expansion in Africa. Nonetheless, the exact location of the duplication and the form of rearrangement in the human genome has not been clarified yet. RESULTS: In this study, we investigated the extra copy of type 2 tri-allelic pattern at TPOX in various populations...
February 14, 2019: BMC Genetics
Sylvaine Renault, Murielle Genty, Alison Gabori, Catherine Boisneau, Charles Esnault, Thomas Dugé de Bernonville, Corinne Augé-Gouillou
BACKGROUND: Both classes of transposable elements (DNA and RNA) are tightly regulated at the transcriptional level leading to the inactivation of transposition via epigenetic mechanisms. Due to the high copies number of these elements, the hypothesis has emerged that their regulation can coordinate a regulatory network of genes. Herein, we investigated whether transposition regulation of HsMar1, a human DNA transposon, differs in presence or absence of endogenous HsMar1 copies. In the case where HsMar1 transposition is regulated, the number of repetitive DNA sequences issued by HsMar1 and distributed in the human genome makes HsMar1 a good candidate to regulate neighboring gene expression by epigenetic mechanisms...
February 14, 2019: BMC Genetics
Stacey M Leventhal, Debora Lim, Tajia L Green, Anna E Cantrell, Kiho Cho, David G Greenhalgh
BACKGROUND: Glucocorticoids are commonly used in the clinical setting for their potent anti-inflammatory effects; however, significant variations in response to treatment have been demonstrated. Although the underlying mechanisms have yet to be fully understood, this variable response may be a result of alterations in human glucocorticoid receptor (hGR) expression and function. In addition to hGRα, the biologically active isoform, a screening of current databases and publications revealed five alternative splice isoforms and hundreds of variants that have been reported to date...
February 8, 2019: BMC Genetics
Alma Ryskaliyeva, Céline Henry, Guy Miranda, Bernard Faye, Gaukhar Konuspayeva, Patrice Martin
BACKGROUND: Whey acidic protein (WAP) is a major protein identified in the milk of several mammalian species with cysteine-rich domains known as four-disulfide cores (4-DSC). The organization of the eutherian WAP genes is highly conserved through evolution. It has been proposed that WAP could play an important role in regulating the proliferation of mammary epithelial cells. A bacteriostatic activity was also reported. Conversely to the other mammalian species expressing WAP in their milk, camel WAP contains 4 additional amino acid residues at the beginning of the second 4-DSC domain, introducing a phosphorylation site...
January 29, 2019: BMC Genetics
Zexi Cai, Bernt Guldbrandtsen, Mogens Sandø Lund, Goutam Sahana
BACKGROUND: Genome-wide association studies (GWAS) have been successfully implemented in cattle research and breeding. However, moving from the associations to identify the causal variants and reveal underlying mechanisms have proven complicated. In dairy cattle populations, we face a challenge due to long-range linkage disequilibrium (LD) arising from close familial relationships in the studied individuals. Long range LD makes it difficult to distinguish if one or multiple quantitative trait loci (QTL) are segregating in a genomic region showing association with a phenotype...
January 29, 2019: BMC Genetics
Lucas Simon Torati, John Bernard Taggart, Eduardo Sousa Varela, Juliana Araripe, Stefanie Wehner, Hervé Migaud
BACKGROUND: Arapaima gigas (Schinz, 1822) is the largest freshwater scaled fish in the world, and an emerging species for tropical aquaculture development. Conservation of the species, and the expansion of aquaculture requires the development of genetic tools to study polymorphism, differentiation, and stock structure. This study aimed to investigate genomic polymorphism through ddRAD sequencing, in order to identify a panel of single nucleotide polymorphisms (SNPs) and to simultaneously assess genetic diversity and structure in wild (from rivers Amazon, Solimões, Tocantins and Araguaia) and captive populations...
January 28, 2019: BMC Genetics
Xiaowen Chen, Jun Wang, Xin Hou, Wucheng Yue, Shu Huang, Chenghui Wang
BACKGROUND: Sexual precocity is a common biological phenomenon in animal species. A large number of precocity individuals were identified in Chinese mitten crab Eriocheir sinensis, which caused huge economic loss annually. However, the underlying genetic basis of precocity in E. sinensis remains unclear to date. RESULTS: In this study, morphological and histological observation and comparative transcriptome analysis were conducted among different stages of precocious one-year-old and normal two-year-old sexually mature E...
January 25, 2019: BMC Genetics
Song Guo, Guichang Li, Jinli Liu, Jun Wang, Liang Lu, Qiyong Liu
BACKGROUND: Rattus tanezumi is a common commensal rat and an important host animal of bubonic plague in South China and Southeast Asia. The northward dispersal of this species in mainland China has been reported in recent decades, along with more recent intercontinental expansion. Population genetics of R. tanezumi in mainland China were studied to explain the relationship between dispersal history and the ancient and modern transportation networks of China. RESULTS: In total, 502 individuals belonging to 18 populations were collected from 13 provincial areas...
January 22, 2019: BMC Genetics
Lu Shen, Gang Ma, Ye Shi, Yunfeng Ruan, Xuhan Yang, Xi Wu, Yuyu Xiong, Chunling Wan, Chao Yang, Lei Cai, Likuan Xiong, Xueli Gong, Lin He, Shengying Qin
BACKGROUND: Brachydactyly type A1 (BDA1, OMIM 112500) is a rare inherited malformation characterized primarily by shortness or absence of middle bones of fingers and toes. It is the first recorded disorder of the autosomal dominant Mendelian trait. Indian hedgehog (IHH) gene is closely associated with BDA1, which was firstly mapped and identified in Chinese families in 2000. Previous studies have demonstrated that BDA1-related mutant IHH proteins affected interactions with its receptors and impaired IHH signaling...
January 16, 2019: BMC Genetics
Camila U Braz, Jeremy F Taylor, Tiago Bresolin, Rafael Espigolan, Fabieli L B Feitosa, Roberto Carvalheiro, Fernando Baldi, Lucia G de Albuquerque, Henrique N de Oliveira
BACKGROUND: Traditional single nucleotide polymorphism (SNP) genome-wide association analysis (GWAA) can be inefficient because single SNPs provide limited genetic information about genomic regions. On the other hand, using haplotypes in the statistical analysis may increase the extent of linkage disequilibrium (LD) between haplotypes and causal variants and may also potentially capture epistastic interactions between variants within a haplotyped locus, providing an increase in the power and robustness of the association studies...
January 14, 2019: BMC Genetics
Lijun Wu, Tao Liu, Yongsheng Xu, Wenjie Chen, Baolong Liu, Lianquan Zhang, Dengcai Liu, Huaigang Zhang, Bo Zhang
BACKGROUND: Selenium (Se), an essential micronutrient in both animals and humans, has various biological functions, and its deficiency can lead to various diseases. The most common method for increasing Se uptake is the consumption of Se-rich plants, which transform inorganic Se into organic forms. Wheat is eaten daily by many people. The Se content of Aegilops tauschii (Ae. tauschii), one of the ancestors of hexaploid common wheat, is generally higher than that of wheat. In this study, two genotypes of Ae...
January 14, 2019: BMC Genetics
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